Well also if he was raised around Muscovy females then he probably won't mate with the Peking hen, if he knows what he wants to mate with then he want mate with anything else
On another note, only 60% of eggs will be fertile if they do mate and then not even 60% would hatch since the male Muscovy to female mallard derived hybrid is huge, they can grow bigger than the egg and therefore not surviving, as well they can be sickly
On another note, only 60% of eggs will be fertile if they do mate and then not even 60% would hatch since the male Muscovy to female mallard derived hybrid is huge, they can grow bigger than the egg and therefore not surviving, as well they can be sickly